IMTEK Internal Circulating Ball Screws
IMTEK ball screws can be divided into three featured types according to their circulating type:
Internal Circulating Type, External Circulating Type and End-Caps Series. They provide high positioning accuracy and repeatability, and it can move smoothly and stable together with a long service life. Highly efficient ball screws are absolutely a good solution for kinds of different applications.
Internal circulating ball screws have five main types:
- SFNUR
- SFNI
- SFMR
- OFUR
IMTEK Ball Screws
- Nut Design
- Lubrication
- SFNU
- SFNI
- SFM
- OFU
| Type | Nut Model | Features | |
| Single | Double | ||
| Internal circulation | SFNU; SFM; SFNI; BSH; SFI; SFU | OFU; OFI | 1-Compact space. 2-Aske for a smaller lead/the outside diameter of ball screws |
Adequate lubrication is absolutely needed when using ball screws because insufficient lubricating will result in increasing friction and detrition, then cause failure or a shorten service life. There are two main lubricant types: consistent grease and lubricating oil. Consistent grease will increase the dynamic friction torque linearly together with increasing rotated speed. Generally, oil lubrication is a better way than consistent grease when speed exceeds 3-5m/min.
| Model | SFNUR |
| Nominal Model | S(Single Nut) |
| Flange or not | F(Flange) |
| Nut Type | NU type nut |
| Thread Direction | R(right)/L(left) |
| Length of Shaft | 100~6000mm |
| Diameter(φd) | 16; 20; 25; 32; 40; 50; 63; 80; |
| Lead(l) | 5/10; 5; 5/10; 5/10; 10; 20; 10; 20; 10; 20 |
| Diameter of Ball(Da) | 3.175; 3.175; 3.175/4.762; 3.175/6.35; 6.35/7.144; 6.35/9.525; 6.35/9.525 |
| Preload | P1/P2/P3 |
| Accuracy of Grade | C3/C5/C7 |
| Load Rating Ca (kgf) | 1380/1103; 1551; 1724/2954; 1922/4805; 2110/5399; 6004; 7142; 6719/11444; 7346/12911 |
| Load Rating C0a (kgf) | 3052/2401; 3875; 4904/7295; 6343/12208; 7988/15500; 19614; 22588; 25358/36653; 31953/47747 |
| Nut Material | 20CrMo |
| Shaft Material | S55c Alloy Steel |
| Model | SFNI |
| Nominal Model | S(Single Nut) |
| Flange or not | F(Flange) |
| Nut Type | NI type nut |
| Thread Direction | R(right)/L(left) |
| Length of Shaft | 100~6000mm |
| Diameter(φd) | 16; 20; 25; 32; 40; 50; 63; 80; |
| Lead(l) | 5/10; 5; 5/10; 5/10; 5/10; 10; 10; 10 |
| Diameter of Ball(Da) | 3.175/3.175; 3.175; 3.175/4.762; 3.175/6.35; 3.175/6.35; 6.35; 6.35; 6.35 |
| Preload | P1/P2/P3 |
| Accuracy of Grade | C3/C5/C7 |
| Load Rating Ca (kgf) | 1380/1103; 1551; 1724/2954; 1922/4805; 2110/5399; 6004; 7142; 6719/11444; 7346/12911 |
| Load Rating C0a (kgf) | 3052/2401; 3875; 4904/7295; 6343/12208; 7988/15500; 19614; 22588; 25358/36653; 31953/47747 |
| Nut Material | 20CrMo |
| Shaft Material | S55c Alloy Steel |
| Model | SFM |
| Nominal Model | S(Single Nut) |
| Flange or not | F(Flange) |
| Nut Type | M type nut |
| Thread Direction | L(Left) |
| Length of Shaft | 100~6000mm |
| Diameter(φd) | 32 |
| Lead(l) | 5.08 |
| Diameter of Ball(Da) | 3.175 |
| Accuracy of Grade | C3/C5/C7 |
| Preload | P1/P2/P3 |
| Load Rating Ca (kgf) | 1922 |
| Load Rating C0a (kgf) | 6343 |
| Nut Material | 20CrMo |
| Shaft Material | S55c Alloy Steel |
| Model | OFUR |
| Nominal Model | O(off set double nut) |
| Flange or not | F(Flange) |
| Nut Type | U type nut |
| Thread Direction | R(right) |
| Length of Shaft | 100~6000mm |
| Diameter(φd) | 16; 20;25; 32; 40; 50; 63; 80 |
| Lead(l) | 5; 5; 5/10; 5/10; 5/10; 10; 10; 10 |
| Diameter of Ball(Da) | 3.175; 3.175; 3.175/4.762; 3.175/6.35; 3.175/6.35; 6.35; 6.35; 6.35 |
| Accuracy of Grade | C3/C5/C7 |
| Preload | P1/P2/P3 |
| Load Rating Ca (kgf) | 1380; 1551; 1724/2954; 1922/4805; 2110/5399; 6004; 6719; 7346 |
| Load Rating C0a (kgf) | 3052; 3875; 4904/7295; 6343/12208; 7988/15500; 19614; 25538; 31953 |
| Nut Material | 20CrMo |
| Shaft Material | S55c Alloy Steel |
IMTEK Ball Screws Specifications
Selection Procedure
When choosing the right ball screws for your application, kinds of details are needed to take into consideration. This Procedure show you clearly about the main specifications needed, such as the load capacity, the maximum walking length, critical speed, etc. IMTEK technical team are always ready to support.
Nominal Model Structure
Please check and confirm the nominal model code of IMTEK Ball screws with us if you have specific requirements but you can tell what you really want. Your demand for the efficiency of ball nut’s mounting space, longer service life and a good performance should possibly be considered when selecting number of turns.
